Thanks for watching and interacting with this suggestion.
Just wanted to let you know that we're actively working on adding Epics and Versions support for Kanban Backlog in JIRA Server. We plan to make it available in the next JIRA Server release.

Atlassian Status as at 26 July 2017
Thanks for watching and interacting with this suggestion.
Just wanted to let you know that we're actively working on adding Epics and Versions support for Kanban Backlog in JIRA Server. We plan to make it available in the next JIRA Server release.
Thanks,
Jakub Lazinski
Product Manager, JIRA Server